# ECHO Water vs The90 Gem

The clearest difference is review sentiment: The90 Gem at 80% against ECHO Water's 20%. The90 Gem also leads on rating (4.3 vs 2.7). ECHO Water's advantage is ratings volume (52 vs 7). On price, update cadence, ads and in-app purchases there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

The90 Gem holds the better App Store score, 4.3 against 2.7. That said, the two scores are not equally well evidenced: ECHO Water has 52 ratings behind it against 7, so its average is the more settled of the two. Written reviews point the same way: 20% of ECHO Water's written reviews are positive against 80% of The90 Gem's.

ECHO Water ships an update every 3 weeks, The90 Gem every 2 weeks. The most recent releases landed on October 16, 2026 and October 5, 2026 respectively.

## The numbers

| Metric | ECHO Water | The90 Gem |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [2.7 (52 ratings)](https://appshunter.io/ios/app/echo-water/id6739596759/reviews) | **[4.3 (7 ratings)](https://appshunter.io/ios/app/the90-gem/id6758100822/reviews)** |
| Number of ratings | **52** | 7 |
| Positive reviews | 20.3% of reviews | **80.0% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 3 weeks | **Every 2 weeks** |
| Monetization | Free | Free |
| Size | 49 MB | 96 MB |
| Requires iOS | 15.1 | **15.0** |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Echo Water](https://appshunter.io/developer/1786253277) | [The90, Inc.](https://appshunter.io/developer/1870863367) |

## What reviewers say

### ECHO Water

[App page](https://appshunter.io/ios/app/echo-water/id6739596759)

This app provides a streamlined and dependable interface for operating your Echo Flask. It offers a simplified user experience for managing hydrogen water generation.

**Highlights:** Simplified operation, Reliable performance, Echo Flask management, Hydrogen water generation

**Features:** macOS Compatibility

**In-app purchases:** none

**What reviewers like**

- 🚀 Sleek and compact design
- 💡 Customizable color options

**What reviewers complain about**

- 🐛 Connectivity issues with app
- 🐛 Inaccurate water tracking
- 🐛 Firmware update problems
- 🔋 Unreliable battery life

**Reported bugs**

- App unable to sync with water bottle
- Inconsistent flask counting
- Bluetooth pairing problems

**Requested features**

- Ability to manually log water intake
- Scheduling options for hydrogen water
- Improved app performance and stability


### The90 Gem

[App page](https://appshunter.io/ios/app/the90-gem/id6758100822)

This jewelry-inspired sensor tracks your skin's real-time UV exposure. It helps you protect against aging and harness the sun's health benefits.

**Highlights:** Real-time UV tracking, Skin exposure monitoring, Aging protection, Sun health benefits, Jewelry-inspired design

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is ECHO Water free?

ECHO Water is free to download, with no in-app purchases.

### Is The90 Gem free?

The90 Gem is free to download, with no in-app purchases.

### Which has better reviews, ECHO Water or The90 Gem?

The90 Gem is rated higher. ECHO Water averages 2.7 out of 5 from 52 ratings, while The90 Gem averages 4.3 from 7 ratings.

### Do ECHO Water or The90 Gem have ads?

Neither ECHO Water nor The90 Gem shows ads.

### Which is updated more often, ECHO Water or The90 Gem?

ECHO Water ships an update every 3 weeks, and The90 Gem every 2 weeks. Most recently, ECHO Water was updated on October 16, 2026 and The90 Gem on October 5, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*